Long narrow knife



FIG. 1 is a left side elevational view of a long narrow knife showing my design therefor;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a back view thereof; and,

FIG. 6 is a right side elevational view thereof.

The handle shown in broken lines forms no part of the design. 

CLAIM The ornamental design for a long narrow knife, as shown and described. 